Oracle Certified Professional Java SE 8 Programmer Practice Test
Build your confidence for Oracle Certified Professional Java SE 8 Programmer. Practice the concepts, understand the answers, and strengthen your knowledge one question at a time.
Try a sample questionExam overview and details
Oracle Java SE 8 programmer certification covering Java basics, OOP, generics, lambda expressions, streams, and Java 8 language features. Administered by Oracle as a linear format exam. Key domains include Java Basics, Working with Inheritance, Working with Methods and Encapsulation and Working with Selected Classes from the Java API. The exam consists of 80 questions over 150 minutes.
Sample Questions
Choose an answer and explore the explanation to see how practice works.
Iris is reviewing a Java 8 pricing module before a certification-style code audit. The code contains assert balance >= 0 : balance; in production, but assertions are not enabled on the JVM. What happens when balance is negative?
Elena is reviewing a Java 8 billing module before a certification-style code audit. An ExecutorService runs Callable task = () -> 42. How does the caller obtain the value?
Iris is reviewing a Java 8 inventory module before a certification-style code audit. A TreeSet stores Ticket objects. The class does not implement Comparable and no Comparator is supplied. What happens when the second Ticket is added?
Mateo is reviewing a Java 8 catalog module before a certification-style code audit. A stream contains List> batches and must produce a stream of each String. Which operation is correct?
Jon is reviewing a Java 8 trading module before a certification-style code audit. Two threads each hold one lock and wait forever for the other's lock. Which condition is this?
Career Opportunities & Salary
Exam insights and study advice
Mastering the topics in this exam is not merely about passing a test; it's about writing cleaner, more efficient, and more maintainable code in the real world. Understanding Lambda Expressions and Streams allows you to process data declaratively, reducing boilerplate code and minimizing bugs. Proficiency in the Concurrency API is critical for building performant, scalable applications. A deep knowledge of Generics and Collections leads to type-safe, reusable components. This certification proves you can leverage Java SE 8's most powerful features to solve practical problems, directly impacting the quality, performance, and reliability of the software you develop.
What this exam covers
Use the published domain weights to plan your study. Practice results do not predict your certification exam score.